cpattern:Status()
This function returns #CAIRO_STATUS_SUCCESS, #CAIRO_STATUS_NO_MEMORY, #CAIRO_STATUS_INVALID_MATRIX, #CAIRO_STATUS_PATTERN_TYPE_MISMATCH, or #CAIRO_STATUS_INVALID_MESH_CONSTRUCTION.
#CAIRO_STATUS_SUCCESS
#CAIRO_STATUS_NO_MEMORY
#CAIRO_STATUS_INVALID_MATRIX
#CAIRO_STATUS_PATTERN_TYPE_MISMATCH
#CAIRO_STATUS_INVALID_MESH_CONSTRUCTION